Well it's taken a long time for this to happen but Dave's Twacks & Twains is apparently alive and open for business. In another post this was mentioned in relation to SHS parts.
They have had an ad in the S Gaugian Magazine for a zillion years now stating that they were moving West to California to open a new location.
It seems that their Westward-Ho! trek is over. They provide a PDF showing all the parts they have to offer.
There are some SHS parts listed on page 12 of the PDF. I think the bulk of the stuff offered is Gilbert type parts.
Check it out! 
Mark
pages of parts...that's awesome!