I have a Delta 46-460 type 1 that has been working great for me for 10 years. Yes, it does have the type one switch and needs to be blown out after every session. I am looking for a replacement on-off switch. So far all I have found is "discontinued part" notices. A few years ago someone posted a source for a replacement switch or alternative. I can't seem to find that post. Does anyone have information about where I might purchase a delta switch part # 5140059-14 or alternative that will fit in the same hole?