The windscreen is FIAT 126 and the rubber seal was originally Reliant Fox (also used a FIAT 126 windscreen). The rubber seal is the same section that Reliant used on the three wheelers and the Kitten, but the windscreens on those models were all smaller, so if the seal has been cut to length for a Robin, or A Kitten, it may be too short - I learned that the hard way.
There are universal windscreen seals available from the likes of Woolies that will fit the windscreen and the Midas body. However, they do not have the extra lip of the Reliant seal. The extra lip is there to stop the glass from coming into the cockpit in an accident. Take a close look at the Gold coupe crash test photo -
http://www.midascars.co.uk/page9.html - the windscreen came off, but did not enter the cockpit. All subsequent Midas models have bonded in windscreens, which is even more secure.
Unfortunately the original Reliant windscreen seal is rare as hens teeth and any you do track down is going to be at least 15 years old. I have been trying to organise a group buy for the last two, or three years, to get a new batch of the seal made. I need around a dozen owners to commit to buy the seal, but so far only eight have put their names forward. I will definitely go ahead with getting a batch made and those who commit in advance by putting down a deposit will get the seal at cost.
Regards,
Alistair