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$24k for an injection based mold is a bit nuts. there are 2 types of injection based molding, high pressure and low pressure. high pressure requires a metal based mold while low pressure can utilize a fiberglass based mold. you may want to look into a polyurethane manufacturer as they are a low pressure based mold and there are all sorts of different weights and flexibility to polyurethane mixtures. some are as flexible and soft as foam, others are as stiff as fiberglass. you could achieve a good seal with a soft polyurethane mixture.
one of the BIGGEST needs for new weather stripping is the outside of the S13 hatchback moonroofs! the ONLY way to get new moldings for it is to buy a brand new moonroof (which runs about $900 now if theyre still available in new old stock)... but the molding is preinstalled on the moonroof itself.
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