I work in medical device development and we use SLA a lot. I actually used this process with an RTV silicone mold and made Handles for a proto device that were quite sturdy. Another route would be to use soft tool ALUMINUM molds which, given the simple nature of the facia could be made for a very reasonable cost (<$10,000) per part cost could be as low as $15-20 each. (We do this for many of our pre-production and pilot products)