I've accidentally walked into my FT handle a few times and it can leave a nice bruise , I can't picture plastic being strong enough , considering it has to be hollow for the wires .
I have no idea if this would work . But the way I picture this going together is , a piece of steel plate about 3-4 mm thick , in the shape of the portal with a piece of steel pipe ( the diameter of the hole) welded to the portal , with thread on the end , so you can put a large nut and washer , to attach it to the cabnit from the inside and put some felt on the back of the portal so you don't damage the cabnit . I would do the colors of the portal in a baked on gloss enamel . The handle I would make out of cast steel and in two sections , like the FT handle , and powder coat to choice of color . Attach the handle to the portal with at least two counter sunk screws from behind the portal . I would like the crystal at the front of the gun to be made out of solid resin , so it is less likely to get damaged . I have no idea about electronics but I would like to see the crystal , c-137 and the start button lit up . I think the hardest part would be the mold for the handle . I would leave the original handle in the game as is . I wouldn't think that the materials to make it would cost that much and if done well , I think it would be a must have mod you could sell for a good price . Like I said I don't know if it would work or be possible , it's just what a picture in my head .