[Don 79 TA]

4secondsflat i think was the place that offered lock out bushings, and at one time would custom make them
i bought a set and use it at the time i was using advance bushings, i have no idea where they are now since i bought them so long ago and had some moves inbetween
worked out nice too
one of them i needed to slightly file one side so it would fit
i don't recall what it limited advance to, but they worked out real well and were cheap
don't know what hardware stores are near you, but i gather if you have some time and patience you might be able to find some bushings close to the size and do a little filing.... i've seen internet posts that some did that

https://4secondsflat.com/MSD%20Distributor%20Tuning.htm