I've used Barge contact cement for years for rail rubber replacement. Now I have a few partial cans around that have thickened, the label says to use Barge thinner only but that stuff is hard to find or costly to ship. Is there a good alternative thinner out there? I have some Fastbond 10 on order as recommended by RKC but may have to use my leftover Barge before it gets here. Also, where is the best place to get the 3M Fastbond 10 online or elsewhere? Thanks.