Reddit mentions of HPS Stainless Steel T-Bolt Hose Clamp Size # 56, fit 2-3/8" ID hose, Range: 2.64" - 2.95"

Here are some that I ordered from:

JST Performance - Cobb Accessport, Custom Tune, Turbosmart blow off valve, NGK 1 step colder spark plugs

James Barone Racing - Weighted short shift plate, Aluminum shift cable bracket bushings, Symposer delete, Green Air Filter (because they sell the gray one)

Depo Racing - 3.5" intercooler, catless downpipe, intercooler pipe kit

Boomba Racing - shifter base bushings, short shift lever

Tire Rack, Discount Tire Direct - wheels and tires. Both offer great deals but I go with Tire Rack because they include an amazing road hazard warranty for free with every tire you buy.

Tasca Parts - OEM Ford parts. Some good options: RS airbox lid, RS Shifter, RS engine cover, RS intake pipes

Amazon - ZL1 Rock Guards (tiny but very effective mud flaps), CravenSpeed stubby antenna, 3D (Mugen) style Window rain visors, Philips H11 Xtreme Vision headlight bulbs (same color as stock but 100% brighter), Stainless T-clamps for your intercooler, Motul Multi DCTF transmission fluid, and TONS of Meguiars car care products.

Walmart - best price for Mobil 1 5w-30 full synthetic engine oil, often have coupons for it too.