3249 Hull only currently on eBay
http://cgi.ebay.co.uk/Combi-Trailer-Merlin-Rocket-Hull-/200621645511?_trksid=p5197.m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D3%26po%3DLVI%26ps%3D63%26clkid%3D786721827783190770
or just go to ebay.co.uk and type Merlin Rocket in the search box.
Looks worth saving.

Having seen the boat it is saveable but a massive project.

It needs:

New decks, inwhales and gunwhales.
Outer veneer on the transom, or a new transom.
Tank top stripping (easy enough with the deck off.)
Centreboard case reglueing to hog.
Total strip and repaint/varnish.

On the plus side it is - or was - dry and there is no obvious sign of rot. It has a decent mast, boom and combi trailer.

It would be a good boat to save, i beleive she ws quick in her day.