Genuine Espresso trays were way too expensive. Around $50!

Ended up buying a 7" round aluminum tray for under $3 from a local restaurant supply store.
http://www.johnsonrose.com/product.php?item=66107

Dremeled the side so it would fit under the grinder.
Worked out perfect and really affordable.

Having recently upgraded from a Breville grinder, one thing I can say is that I do miss the thought they put into their products for average homes. I hardly ever had grinds spill onto my counter, pretty much everything was caught by the tray. A tray that was connected magnetically so it never moved around but was super simple to detach and clean.

With the new grinder, I'm wiping around it nearly every day. I might have to do the dremel-tray trick.

Another option is to make a funnel.
I made one out of Stainless Steel tube I purchased from a local metal store https://www.metalsupermarkets.com
2¼" O.D, 2⅛" I.D, 2" length, which collects all the grinds from the grinder outlet chute.
It worked really well, but I prefer to use the portafilter holder of the grinder.