Your best bet is to look up your nearest Ransomes Jacobsen dealer using the Dealer Locator on their website.
Beware, though, these were sold by Ransomes before they were combined with Jacobsen; they were not an Ipswich built product but were badged up Steiner products. What you have is the Turf Trac T-16 which was built and marketed by Steiner in the U.S.A., and were painted red when sold under the Steiner banner. They were only sold for a short space of time and came into the country in the late 1980’s whilst I was still a humble mechanic, then as I became a sales rep in 1990 I managed to sell a few before they stopped doing them (I think) around 1994.
They were sold as bank mowers and would stick to the proverbial brick wall, but they had a nasty tendency to lift a rear wheel if you decided to reverse whilst on a side slope. If you kept them going forward they were fine.
One story that I can tell you is of the boss’s son doing a demo with the larger brother, the T-21. He went down a steep hill on a golf course in Hereford with the front mower raised in the transport position. At some point he “chickened out” and slowed the tractor down, but all it did was tilt forward so that the mower was on the ground with the rear wheels in the air. This put the tractor into a very unstable condition, with the front wheels now acting as hydraulic pumps as it free-wheeled down the hill and the back wheels revolving backwards at the same speed; with the back end in the air there was no control over steering or speed and he bailed out pretty quickly, much to the amusement of the customer.
And, no, he didn’t buy one after that!