The MCATS turret is available on the Shapeways:
http://www.shapeways.com/product/7MZTL3M2L/1-35-spm-35-040-mcats-turret?li=shop-results&optionId=57531146http://www.shapeways.com/product/FUQVXHMNS/1-35-spm-35-040-a-mcats-turret-x2-in-set?li=shop-results&optionId=57531266Stuart, I did some research on the replacement of windows in sets and have such ideas.
To replace armored windows details can use transparent plastic boxes from the CD/DVD discs. Standard box for TDK CD/DVD has a thickness of 1,3mm. Thin box TDK discs has a thickness of 1 mm. This plastic can be used for cuting of windows for SAGII turret. From the outside the glass to make a chamfer on the edges. To use 3D printed windows from set as template.
The using of plastic bottles for water capacity of 5 liters. The wall thickness on the side of the cylindrical part is 0.3 millimeters. Color plastic - colorless, blue, light green. This is similar to the shades of armored glass . I cut with a scalpel several strips 4X1,5 cm from smooth lateral part of the bottle. The strip is bent slightly as it is part of a cylindrical surface. It is not essential, because in the gluing process of the small squares (cuted from strip by templates) the detail is rectified. But it is possible to straighten the initial strip. This is done by thermal effect - smoothing-iron. Heat mode 1 or 2 (wool). Needs a wooden board (suitable board for kitchen cutting), the average thickness of cotton cloth (a pillowcase). Plastic strips to put on the board, cover with a cloth in two layers, press the heated iron on the one second, remove the iron for a few seconds and press again. You can turn up the strip other side on top and repeat the procedure. It may take several attempts for the experience.
From these strips can be compiled window glasses with different thicknesses. And one can use 1-2 liter plastic bottles, with thinner plastic (for the outside thin glass on MCATS turret).
Also, there is a packing boxes with transparent inserts (for the toy cars, dolls) and other packaging boxes.
I do not forget about the TOW sight, I try to do soon.
Roger, have a good trip!