It turns out the company that built rails for the 11's BITD is still in business, and still selling rails. I don't think they still make the exact model used on various -11's, but they have almost identical units. (Now, whether they have holes in the right places, I'm not sure. I was going to buy one to see if the coating on the modern ones looks to be the same thing as the old ones, but they were kind of pricy - $130 or so, IIRC - so I'm holding off at the moment.) The company is General Devices, and you can see their slides here: http://generaldevices.thomasnet.com/category/solid-bearing-slides?plpver=10 I think the model we'd want would be like the CTHS-124 or CTRS-124 or something. They don't sell retail, but they gave me the name of a dealer who will: Newark/element14 North America National Distributor 1-800-4-NEWARK (1800-263-9275) If you went this route, you'd probably have to replace both sides, but I think they big issue would be the holes. Noel