I bought the gauge and fuel rail adapter from Summit, but then went to my local speed shop for the other fittings and braided line...it just seemed to be easier at that point to take my junk into their store and plop it down on their counter and explain what I was trying to do - then they could ensure I bought the right pieces.
That being said, I can give you some insite to what you'll need (brand name doesn't matter, but just to give you some costs, I looked up Earl's stuff):
for the fuel rail:
1X Autometer fuel rail adapter #3280 ($7.95)
1X Earl's 90 degree elbow, AN to pipe (-4 to 1/8") ($7.69) (you'll need 2 total - you could use straight adapters rather than elbows, and I didn't use elbows, but I will the second time around...it makes for a cleaner install and prevents the hose from sticking up in the air so high. It's up to you. The straight adapters are about 1/2 the cost of elbows, but in the end, the cost difference would be about $6.00 overall...minimal coin to make a clean install)
for the sender connection:
1X Earl's 1/8" Female Pipe Coupler ($2.95)
1X Earl's 90 degree elbow, AN to pipe (-4 to 1/8") ($7.69) (you'll need 2 total - see comment above - now on the sender end, after looking at my pic again, I realize that you might not want a 90 degree elbow...it could point it right into the air inlet tube. A 45 degree elbow is also available, or, as I did, just a straight adapter.)
and then the hose in between:
I used a 16" length...you might want it a little longer (like 18" maybe - the 16" works, but there isn't much slack at all)? See my pic above... (cost ? - I don't see pre made SS braided hose with ends in Summit's catalog - figure on paying less than $20 for it.)
All told, you're looking at about $45.00...BUT...you don't have to buy Earl's. In fact, Summit has their own brand of AN fittings and such. Also, look at EBay. I've also bought brand new AN fittings on EBay (do a search for "AN fitting") at great prices. I'd bet you could do this for around $30-35 - which is well worth the money and also insures your sending unit has a long life.