DUSTYINMN: Welcome back
If push comes to shove last resort kind of situation, pick the current aftermarket miter guage that most suits and appeals to you. Then, void any warranties and take it to a machine shop or a school with a machine tool program and have them mill the miter slide to your specification. As RONTETI proposes, making your own miter guage is not too difficult. Perhaps now is the time to consider a cross cut sled with modifications to cut angles.
Good luck in your quest and please let the forum know of your results and solutions. your isan interesting situation.