Technical Master Cylinder Boot?

I purchased a basic 2 pot GM master cylinder for my build. The MC showed up without a boot (the seller assuming that you have the original boot to re-use I suppose). It turns out that the MC’s do not come with a boot and I have been unable to locate a place to buy one )I admit that I just now thought that perhaps the Chevy dealer would have one). Anybody have an idea (or one to sell?) where to buy one?

 

a quick google search shows a bunch of them for sale....

 

My brain is old enough to not think of google first LoL. Thanks for the reminder.