Do you have a circular saw or know someone who owns one? You can use some clamps and a straightedge as a ripping guide. Make sure the saw and guide are supported underneath. This may mean sticking some 5/4 scraps under the sides.

Look up a store called WoodCraft. If there is one in your town, they can do that.

Advertise on Craigs list.

ind a local cabinet shop.

Do not expect it for free from a commercial place.

A real lumber yard should be able to do the rip for just a few dollars.

Bring me a small plate of brownies or chocolate chip cookies, and I'd barter straight up. I'd get the best of that deal.

All great ideas. Thank you all. I knew you guys would have some helpful input.

(bobsmyuncle, if none of them pan out, I'll get workin' on those brownies!)

Try looking up a local woodworking club. If it's like ours, you'll find some flannel-shirted retired guy who could probably help you out.

Here is a link that might be useful: Club Directory

If you have a retirement community near you, they often have a woodshop where I'm sure the brownies will get your board ripped.

snikcilla, Where are you located?

Look for the nearest home being built, oh wait thats not happing much anymore, sorry!