Kodak used to sell a kit for Tri-X. When T-Max came out, it was
renamed for T-Max, I don't know if it was reformulated.

As Richard said, you can find formulas on the web for do it yourself
chemicals,

The following may be of interest to you:

    go to http://www.photoformulary.com and search for "reversal".

 "REVERSAL PROCESS FOR T-MAX FILM is the formula developed by
  Hans F. Dietreich and appeared in the
  March/April 1988 issue of Darkroom Techniques.

 The T-MAX reversal process allows black and white slides to be made from
 T-MAX 100 or 400 black and white negative film. The reversal process
 will produce excellent positives from one to two stops higher with the
 same development time; however negatives will be a thin positive. The
 kit makes five solutions (2 developers, bleach and a clearing bath).
 This kit will develop 4 rolls of film."

It's $28.75 plus shipping, so it may be an expensive experiment.

Back when Agfa Scala was still available, but hard to get, one lab had
good results using the process with Efke KB-25 film. Freestyle sells
it as R25 in 120 rolls, it may work for you.

Geoff.

The Ilford reversal processing pdf is at:
<http://www.ilfordphoto.com/applications/download.asp?n=11>

Peter.

Back when I was doing a bit of film testing and article writing for View
Camera Magazine the folks at Foma sent me test rolls of the Fomapan R
film for review.

For reasons I can't go back to for loss of the info I found that
processing the film myself was not an option. Something about the
process did not appeal to me or was rather nasty.

I looked at two labs, one was DK-17? in California that wanted a vast
sum per roll. The other was Duggal in NYC. Duggal processed the film and
it was beautiful. Not sure if they still offer the service or are in
business.

Unfortunately Steve Simmons and his Buddy Tim lost my film in their
haste to split View camera and Camera Arts Magazines.

My article was never published related to the Fomapan Films.

I do however have a scan or two from the Fomapan and one roll of the
reversal film.