Teleconverter for DP2M?

Does anyone know if there exists a quality third-party add-on tele conversion lens that could be used with the DP2M?

I was looking at the Panasonic DMW-LT55 or the Canon TC-DC58[B/C/D] series. Don't really use these sorts of lenses often, so I don't know much about them, but I figured it could be a lot smaller than a hefty DSLR while making the DP2M a bit more versatile. A step-up ring will be required. Any ideas?

http://www.bhphotovideo.com/c/product/463323-REG/Canon_1594B001_TC_DC58C_2x_Teleconverter_Lens.html

http://www.bhphotovideo.com/bnh/controller/home?O=&sku=587451&Q=&is=REG&A=details

http://www.bhphotovideo.com/c/product/396536-REG/Panasonic_DMW_LT55_DMW_LT55_55mm_1_7x_Telephoto.html