Com on doit.......get with the ice game.
I’ve stayed off of this thread because I’m simply not as serious about ice fishing as I am open water fishing. Even though I only sit on a bucket jigging for pannies around a dozen times (average) per season, I have three molds that I use strictly for ice jigs, including one modified via dremel and JB putty to get exactly what I wanted… which is what I would recommend to you.
When looking at the current Do-it line up, as Walleye Wacker mentioned, I think the shad dart jig (https://store.do-itmolds.com/Shad-Dart-JigbrSz-164-132brHk-570-or-575brCollar-None_p_710.html
) would be easiest for you to personally modify into a marmooska style jig like you’ve been hoping for simply by making provision for the hook to lay the other way in the mold.
Another option could be to carve out the collar on the 1/80 or 1/64 oz semi-custom jig mold (https://store.do-itmolds.com/Round-Head-JigbrSemi-CustombrSz-180brHk-570-or-575brCollar-Plain_p_1079.html
) to make your marmooska style jig; supposing this mold price might be too high to tinker with, then I think the roundhead reverse barb jig (https://store.do-itmolds.com/Round-Head-JigbrSz-180-164-132-116-18-14brHk-570-or-575brCollar-Reverse-Barb_p_528.html
) could also be an option for a similar modification.
If you are unwilling to modify a mold currently available, going straight to CNC (as others have suggested) might be your only other option to attain the exact mold you are looking for.
I have taken a couple tours of their facility and I'm sure Do-it would not be able to mass produce this mold through sand-casting as they do with virtually all of their other lead molds (because of the precise design and hook style you are looking for). Even if they could sand cast this, going from conception to design to production costs the company thousands, before they even sell one. Then they would have to sell hundreds in order to recoup their investments since they sell the vast majority of their molds at wholesale (to retailers where most people buy them).
I’m sure the company has analyzed their potential investments against the potential sales and given the age of this thread without response from headquarters, I think you might be beating a dead horse... which takes me back to my initial thoughts that a dremel and JB putty (or CNC) could have you in production much sooner than the time this thread has been around.