Quoted from Gatecrasher:
There's a thread on here somewhere by the guy who said he was doing the aprons. I hadn't thought about it in a while but I haven't seen the aprons yet so he may have just been talking.
I believe you might be thinking of merfeldma post at https://pinside.com/pinball/forum/topic/williams-high-speed-ball-archapron-remakes/page/2 and https://pinside.com/pinball/forum/topic/williams-apron-remakes-what-titles-to-start-with-cast-your-vote
He seems to have abandoned this! He did A HSII and TOTAN apron that was nice but the artwork was so so on the TOTAN! Last I heard he was busy with dental school and, as you can see, his post is archived!