That is a fantastic micro-to-mini. My Chinese is a bit rusty (and by rusty, I mean non-existent) so I can't tell if it lists that it's OTG capable or not! If so, that's aesthetically pleasing and looks very sturdy. It's also a great price at ~30 USD.
Matthew got back to me very, very quickly. (Customer service is in no way lacking over at Forza.) He said that ATM they don't have a right angle version of their OTG cable, and that modifying one of their existing ones would take a lot of work involving epoxy shaping. I'll send a PM with the price because I think it's a bit of a social faux pas (or, at minimum, just rude) to post custom cable pricing offers in a public forum. Even at the premium price, I'm milling it over a bit. It's a nice looking cable, and I know that Forza cables often outlive the devices using them.