First of all, i must say hambone you are the master!! thanks for all the help to all the TBers
Dear PB, i just finished the 5 to 6 convertion of my old wide 5 strings
i had been searched around, and i find stewmac, allparts and some ebay shop they did offer diff bridge, it all up to the spec you need
it had been tough for me to find a 16mm 6 strings bridge, but i did got one (not a very good one but still ok) on the bay
i have a older hipshot style A, leaving out, so chk out your spec and let see if i can help
worth to do a search on the ebay
p.s dont forget WD and the mighty mite
Gotoh has some decent bridge made as well