Does anyone know where I could find a 2 blade 70gr. Broadheads???

I sure don't....that aint much hardware at 70 grains....whatcha got in mind for those?

Mosquitoes   :D

You could take a 75 grain Muzzy 4 blade and remove 2 of em.    :D

Magnus stinger comes in 85 grains as a 4 blade with bleeder.  You can remove the bleeder and it should get you close to 75 grains.  I dont know of any other cut on contact that will come in so low.
Good luck.

Just realized that you are looking for glue on.

Dunno, you might have to take a 100 grain head and grind it down.  

Theres got to be another workaround, why do you need 70 grain head?

I didn't see glue on in the thread title either.  Sorry

The Magnus 85 gr 5/16" glue on head is the lightest I can think of.

Don't think you are suppose to shoot a 4-blade stinger with the bleeder removed. But, could be wrong.

Well I got my New Yellowstone D shaped longbow in  43@27. Ordered 2 dozen 5/16 shafts in 30-35 spine... My thinking was that with 43#'s shooting dacron, 2 large wool silencers, and a low brace I would be just about right??? I was wrong... I know? I know?? String Cutter being wrong??!!! That's what I keep telling my Ex too..... Well anyway I cutt the arrows all the way down to 27 1/4 inches using 125 and they were still way to weak. So I ordered some 70gr. tips like Stu's Cal. said I needed... Now they fly like darts...

Just curious, String Cutter- are you planning to hunt with that rig? Deer?

I'd be shooting a 250 grain broadhead on the end of an Easton Epic 600 if I was shooting that bow.  Extreme FOC, thin diameter, slick finish and around 500 grains total.  They work great for deer and hogs, trust me.