I can make the 1inch no problem,do you want that exactly 1inch?I have no way of knowing how much shrinkage you will get from a mold of exactly 1inch without making it then trying it.Maybee you can help?I can make it plus or minus .01 of an inch.As for the 2.5 I can do it but I need to buy some tooling.I will send you a massage.