Casting Rubber Parts

[Dubis7]

So I have a variety of projects that need some rubber parts replaced. These are from a variety of appliances and run the gambit on condition - some are dried and broken into shards, others are intact, some are melting, etc. None can be found anymore, so I'm looking to have them reproduced based on the examples I have.

I talked to Ed Schutz, and he's unable to help me because of his workload. I've had him help me in the past so I know this is possible. Additionally, I've looked at some tutorials and the process seems like something I could do myself without any issue.

Does anyone have any experience casting rubber? I'm thinking of using silicone because it sounds like it lasts longer, but I haven't found a good source for what I need. Also, some of these parts are exterior, so I'd want to replicate the colors as closely as I could (cream and black, so thankfully nothing too bizarre.) I'm trying to find a good source for rubber or silicone that can be cast into the parts I need, probably using a silicone mold. I've seen flexane, but it looks rather expensive. Are there any cheaper options available? Admittedly I don't know much about the kinds of rubber available, so I'm not sure what would be best for these parts, especially since several are used as chassis or motor mounts.

Any advice or help on figuring this out is appreciated. If I can get this going, I'd be happy to keep the molds available to help everyone else out as well. Without undercutting Ed, of course.