If you are one of the lucky ones to have this "Bomber B" program kit, which was released only once in 1999, you will find this to be the ONLY aftermarket specifically available for it. If your canopy parts have yellowed as mine have, it is not the end of the world. You can mix up some "Durhams Rock Hard Water Putty" or equivalent and pour it into the canopy. When hardened, simply pop this new male form out (it doesn't stick) and vacuum-form a fresh canopy over it with PETG sheet such as K&S Engineering #1304 (there are articles and tutorials online about how to do that). I have done it several times, it works! Masking old vac canopies- with their indistinct, soft framework and fragile nature- is always a fraught exercise and I don't know anyone who enjoys it. I am happy to have paid the money to someone who has made that job so much easier while also providing a more professional final appearance