I have Warmoth necks with the Wolfgang & 59 Roundback contours. The Wolfgang feels very substantial - despite being thinner front-to-back than the 59, it "fills the hand" more. To the naked eye, it looks "rounder" than the roundback, which is almost like a super-soft V shape in comparison.
Anyway, my point is that if the SRV is a similar shape, then it's going to be a LOT of neck.
Warmoth are happy to ship products over here (by UPS) & their service is excellent. If there was ever a good time to buy, then with the current £:$ exchange rate, it's NOW :)