If you have access to a scanner and an image/graphics application (photoshop, canvas, illustrator, etc.) and some time(!), you can scan the plastics you have and then attempt to recreate them yourself. There are many more pinside topics on making plastics but below are a few I used for inspiration in making a few sets for myself.
https://pinside.com/pinball/forum/topic/my-guide-to-making-your-own-reproduction-plastics
https://pinside.com/pinball/forum/topic/how-i-recreate-plastics