Mold-tech and YS (Yick Sang) are more popular, the latter is relatively cheaper than MT. You'll also have to check the recommended draft angle for...
Couldn't see the pic. 1mm thin plastic is moldable given that it has proper draft on moulding face.
You can explore PMMA as well, it has excellent transparent properties and this might server your purpose. Are you using clear & transparent or...
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