I suspect that the only way they might even consider doing something on a mini hb is a rewind job using your existing baseplates and covers. I wouldn't imagine that they would contemplate making or sourcing baseplates and covers in such small amounts. However, there are also other issues. Handwound doesn't entail winding the wire around by hand sitting on the back porch. Generally it involves a devices that rotates while the wire is wound on. It might be possible that they could use the P-90 one, but I wouldn't bet on it.