I wish I could help with that. I only really know of one site with Dakis that's moreso trusted than some others.

There's not a lot of custom work for these, the cost's prohibitive because of the design... if you want a cheap 1 check eBay. If you want a good 1, expect to pay. I've several that I've collected. I currently use a Boa Hancock that I got in a grab bag thing. If you want to go epic and overpriced I suggest looking for something like this:

http://www.crunchyroll.com/anime-ne.....ded-to-comiket

Not advertising this site specifically, but they did have some officials that were about $20 or so...

https://solarisjapan.com/collections/mousepad