Hi tug.....I expect Graupner will be more than happy to sell you a set of plans. (No. 2147) on 3 sheets I think and the instruction booklet might help unless you have that already.
This kit must have been a good earner for them as it has been on the market for 40 years (1973) and was the first vac formed hull in a kit. That should set the cat amongst the pigeons!
I am still building mine, well I am only 7 or 8 years into it and technology keeps changing, good luck,
Roy