haven't spoken to tim but i did phone this morning. They suggested either the nailbomb or crawler. I don't want over bearing mid range so not sure about the crawler. Nail bomb sounds interesting but what a terrible name . . Lol.
It all depends on what kind of tone you're looking for. But anyway, having both a Crawler and ABomb bridge:
The Crawler is far from having an "overbearing mid-range". It's a full, warm (*not* muddy) sounding pickup with a very definite vintage vibe and feel but tighter and hotter than a vintage PAF / PAT like. Nice jangle in the highs, warm and rather fat mids, yet still sharp enough to cut thru the mix, and warm yet detailed lows. It's a very versatile pickup that works fine from pristine clean to heavy distortion, great for blues, reggae, classic rock, hard rock, and can even do metal with the right rig and player but if you're into modern metal you might find more appropriate stuff in the contemporary range. Ho, and it's said to split very well - didn't tried it split by myself for now but I can well believe it would work fine given it's tone and output level.
The ABomb is a very different beast. Just a bit hotter, but *way* more modern and aggressive, with brighter highs, a raspy, abrasive mid range and very very tight lows. Surprisingly, it's a bit more open sounding (-> less compressed) than the Crawler, but that may also come partly from woods and construction (cf below). It maintains full clarity and definition even at insane gain levels yet cleans up very well with the volume pot, to more classic (yet with a modern edge) rock tones. Great pickup for hi-gain stuff, can do pretty good mid-gain tones too, clean tones are fine but not as rich as the Crawler. Not strictly a metalhead pickup - I'm not into metal FWIW -, but definitly more on the modern side, and while still more versatile than you could expect it's not as versatile as the Crawler.
Both have the usual BKP qualities - articulation, definition, clarity, and great tone when on the right guitar.
FWIW, I have the Crawler on a bright and tight going-thru maple neck / maple sides / rosewood fretboard japanese (Matsumoku) Vox from the early 80s, and the ABomb on a rather dark / full sounding 80's SG Standard, and the SG/Abomb is by far middier sounding than the Vox/Crawler one.
Also, it happens that the ABomb actually replaced an old JB(J), and I can tell you it's not sounding the same at all - the ABomb is way more abrasive and aggressive than the JB. I've not tried the Crawler in the SG (wouldn't work fine IMHO) nor the JB in the Vox, but if the JB you played have anything in common with the old one I have and given your pot's values considerations, I really think you'd be happier with the Crawler on this guitar (assuming it's in the usual strat range wrt/ brightness).
My 2 cents...