If there wasn't enough demand ~20 years ago for Intel to continue manufacturing the part, it's far less likely that there's enough demand now to justify designing, manufacturing, and qualifying a new part to replace it.

Wafer.space slots can support around 4-500,000 transistors in 1x1 titles, usually reserved for 1000 dies. The 386 (non SLC version) had 275,000. In theory this could be manufactured at 180nm/130nm https://wafer.space/