Get one like this:
MythTV LIRC RS232 IR Blaster (scroll to bottom of that page)
You need to buy an IR blaster like that, that has a standard 1/8'' (headphone) jack.
Then go to Radio Shack and tell them you need 30' headphone extension cord that has a coupler on one end.
(it will look like this, only in a longer size) If they don't have any longer, just get 2 short ones (like the one linked above is 16ft, so buy 2 of them, (thats 32ft) and the couplers are built into the cable!)
The plug is the same as a headphone jack, so the cord should work through the extension.
Let me know if that works out!
-Scott