I've recently discovered this website and their mask making service. They will custom make your canopy and wheel masks if you send them the clear parts and one each of any wheels in the kit. That service is free, other than your shipping out costs, but it also allows them to expand their inventory of ready-to-buy mask sets. The masks are generally available in both vinyl and Tamiya tape, or both if desired. This almost sounds too good to be true but I'm taking a shot at it. I'm sending the parts for six aircraft that all have multi-paned canopies and some with really complex shapes, like the Monogram MiL-24 Hind and the He-111. I guess the main risk is loss or damage to the parts while in transit, but I'm gonna roll the dice.
Unless someone comes along with a sad story of misdeeds or chicanery by those folks, that is.

I've got all the sets bagged up and padded with bubble wrap and all that's left is sealing them up and driving to the post office. Here's a link to their site; if you have experience with them, please share your story here.
https://kitmasx.com/