If you have a decent vinyl cutter you can use use it with the correct knife to cut up to 1.5mm plasticard.
For window frames this works well and I have seen a complete wheelhouse cut using this method.
You may need to use a scalpel to free some of the cuts but it does produce very accurate results and is repeatable.

Happy i could point you in the right direction

Mark

I was lucky with my 4 foot boat, I had a milling machine, but with thew 3 footer, I used plasticard and cut out by hand with a sharp knife.
The problem with the earlier aerokits boats, the windows are never quite the same boat to boat, so you end up with a thick profile frame to cover over any discrepancies, if you know what I mean. The fitting set at slec looks a bit expensive at £35....🤔

and here's how 😉 -
http://www.slecuk.com/index.html
Slec Ltd
Units 8-10
Norwich Road industrial Estate
Watton
Norfolk
United Kingdom
IP25 6DR

TEL: 01953 885279
FAX: 01953 889393

Mark - many thanks for that lead - just spoken to them - v. useful as they do supply the set of windows although they are not on their online shop. Hopefully they will save some "fiddly" work. Cheers - Peter

Hi Peter, go to SLEC, they have taken over making the 34" boat, they do the spares as well

Mark

Paul, thanks for the reply - I was hoping to avoid the "fiddly" but guess I am going to have to give it a go. Thanks for clarity on No. 93 only having eyebrows over cabin windows - so many pics "models" on the website seem to show frames on all windows !
Now to the nitty gritty - I don't have milling capability so do you think I can get a reasonable result with fret saw/file and plasticard? What thickness should I use? Thanks - Peter

Hi Peter, its only the wheelhouse that has frames, sides, screen, and the two rear windows. The cabins didnt have any, other than brows over the top of the front two, the style differs depending on it being 93 or 94.

I made my own from plasticard, very fiddly but worth it