A couple of options -
If you can get a secondhand renntec for the daytona or speedy from a breaker or e-bay (there were a few kicking around a couple of weeks ago) it would be easy enough for your mate to chop the mountings off and make up new ones. A bit of trimming of the seat pan would probably still be needed.
Although the 02 onwards speed triple and late daytona seat unit and seat look the same when you lift the seat you can see there are a couple of small differences that prevent the daytona or pre 02 speed triple rack being a straight bolt on. A couple of sections would need cut out of the tail unit and the same with the lip of the seat pan and the seat supports and a change to the rear mount of the rack should do it.
The mountings on the renntec look like this, might help-
http://cgi.ebay.co.uk/TRIUMPH-DAYTON...QQcmdZViewItem