Some time back DMS worked with Richard Thorne to do a chip for the Aero.
I have reason to believe it was for the 4.8L in the S4 and Max (now Coupe SS as well) so it would not be suitable for the S1 and S2.
It might be worth approaching RTCC.co.uk and DMS to see if they have anything. If they don't have it in the archives I doubt they would put the effort into it now as this is not going to be a big seller.
You might be better just putting the money into trading up into an S2/3/4 at some point. The Morgan re-cycling market seems to be good right now
