At edmika.com, build a comprehensive and easily browsed listing of all of your products, link each specific product's page to the appropriate ebay listing.
Use lots of keywords.
Try this, I just did. On the ebay home page, enter ed mika as the search term. You should be real disappointed with the results.
I couldn't find your ebay listings until I searched for "canon lens conversions", found one listing, clicked through on that product page to 'see other items' and/or 'visit store'.
Even knowing in advance pretty much what to look for, your ebay store was work to find.
Seriously Ed, you have established for yourself a reputation of positive note, that reputation is linked as much to your name as it is to your work.
Compare searching ebay and google for Ed Mika to the same searches for Gary Fong, another Canadian photo gear entrepreneur to get an idea of what I'm meaning to say.
Obviously your on-line presence wont scale the same as Fong's as your products are even more niche market than his, still, your current presence seems to demonstrate a bit of a lack of a sense of self worth and I think you are selling yourself short.
Hike up your pants, comb your hair, glue a smile on your face, look at the marvelous work you do, get out there and start promoting your products and yourself like you deserve.
The World will be a poorer, sadder place when brilliance and craft like yours fades away, please, do yourself and the world better than what's currently at http://edmika.com