I don't think that the reissues are the same size but they might be. Contact Yamaha but good luck...they are a pain in the neck to get a hold of.
Best bet is to scour eBay...
Or, and this takes a little work but can be done...find a metal shop, have a new block made and have it drilled for a different bridge and then use that bridge...
That said, this is a whole lot easier and in the end will cost less...
http://www.ebay.com/itm/70s-Vintage...624?pt=LH_DefaultDomain_0&hash=item5402b399d8