XD40 Drum Magazine and accessories?

[AlwaysCenterMASS]

I bought a Springfield XD40 recently. I love it. I have 3 20 round extended magazines. I was wondering if anyone knew where I can get somthing larger. It doesn't have to be a drum, I just wanted somthing larger then the 20s that I have.
Also I was wondering if anyone knew where I can get accesories specifically for the XD40. I have a laser, but I was thinking different barrels or slides, heck anything to make it more MY weapon.

 

[TEXASforLIFE]

Bat-Sto for barrels. No answer for drum mag for the xd. You can add a 357sig barrel conversion and use the same mag.