Help finding adapter fitting

Anyone know where I could find a 3/4 inch tap fitting to 1/4 inch John Guest adapter locally? I've been striking out.

It's for hooking my RODI to my kitchen tap. The threads are stripping on mine and it creates a wonderful explosion of water and chaos if I try to use it; ultimately meaning no water for Shane and his fishes since the wife has officially nixed its use.

Any help would be appreciated by both myself and my tank.

 

Looking for more local, IC or Coralville area preferred... I'm looking to avoid shipping costs for a $3-4 dollar part.

I will however, consider that an option if nothing else pops up, which very well may be the case and in the end faster. Thanks B_Braz!

 

So Menard's in IC didn't pan out. Or maybe the guy didn't know where they were. He tried to rig one together with various parts but it didn't pan out when I tried to hook it up at home. In lieu of making another drive, I ordered the part from BRS. Needed some filter socks anyway.

Thanks everyone.