No idea where you are getting the price for an oil dipstick. But they are ripping you off. I just ordered a new one from www.mitsupartsdirect.com . I called them and spoke with Mike Deal who is in charge of the parts dept there. I told him I was a member of DSMtuners and he hooked me up. I got a brand new ICS for $118.00. I also got the dipstick. Here's the part # and cost :

MIT MD312865 GAUGE,ENG OIL LEVEL 1 $6.54.
I am looking at getting all of my OEM parts from them as they have constant specials. Best I have been able to find. A special thanks to firebreather for hooking me up with Mike @ mitsupartsdirect.com.

BTW they are revamping their website so might want to call them instead.