Ear plugs would definitely be the cheapest solution, unless I bought then at the HD store. Then they'd be $29.99 apiece

 

When did they go on sale????????????

 

Can't help answer your question about the mfgr. of those pieps but, if the last three or four inches of the pies are straight you can get some "can opener" baffles fairly cheap. Drill a hole in the bottom of the pipe if it doesn't already have one so you can thread a screw into the baffle to keep it in place.

 

That was too funny

 

Trying to recomend a type of baffle for the best sound is nearly impossible. What sounds good to me might not sound good to you and there are a thousand different types of baffles. If your not sure what kind of sound you like yet, the cheapest way is to go with the v-cut baffles monkeyboy recomended. Get the longest ones you can fit in your pipes. They can then be tuned for sound and volume by taking a long punch or screwdriver and flatening the inside tabs one-by-one until you get the sound you like.

 

That is a nice bike there. Keep it loud the way it should be and wear ear plugs.