Index of Magazines at MR home page lists a "Work Chair Dolly with Tool Holder," in an NMRA Bulletin Apr 93. You might try auto parts stores, I have seen roll around chairs listed in tool catalogs, some with 4 legs and casters one with two large rollers.
Good luck
Mike Lehman
Urbana, IL
While browsing the internet, I ran across a modified automotive "Crawler" for use working under the train benchwork. The castors were removed and a wooden craddle was made for the crawler to mount to and the castors were reinstalled on the bottom of the craddle. The height of the craddle would have to be established to fit your layout. One might also make it adjustable for various heights. I can't remember where I saw it, but it sure gave me the desire to build one for myself. The crawler that they used had an adjustable headrest to make it more comfortable.
Regards,
Dave
For my (currently frequent) expeditions under the benchwork I use an unmodified creeper. Can't remember the manufacturer, but it was purchased at a local auto parts shop for under $30.00.
This particular creeper has a steel frame, six casters, nice padding and an adjustable headrest. It easily handles my not-inconsiderable bulk, and has taken a lot of the discomfort out of installing risers and under-the-track framing. [I use steel studs for L (C?) girders, joists and risers, and screwed from the underside steel angles to de-warp my plywood roadbed.]
Chuck (who will use almost any excuse to lay down)
Dal, there was a an article in Model Railroader on how to make that exact creeper. I just couldn't find that issue...
Marlon
See pictures of the Clinton-Golden Valley RR
Sears and Harbor freight have them. About $39.00