Need source for new optics

I'm new. First laser -- DianMan DM 1290 --using it for hobby.

I was cleaning the optics on my laser and cracked the lens. Stupid on my part.

I'm starting the search for replacement parts. Any assistance choosing the best part supplier is appreciated.
Here are some pictures of the parts needing replacement.
2013-05-11 19.42.03.jpg
2013-05-11 19.42.39.jpg
2013-05-11 19.38.24.jpg
2013-05-11 19.39.01.jpg
The shaft is 3 11/16" long and 13/16" wide. The cone is 1 3/16" wide at the bottom.

Thanks for your help,

Eric

Attached Images

• 2013-05-11 19.42.39.jpg‎ (48.8 KB)
• 2013-05-11 19.42.03.jpg‎ (53.4 KB)
• 2013-05-11 19.38.24.jpg‎ (45.0 KB)
• 2013-05-11 19.39.01.jpg‎ (49.6 KB)