5Forms.com Carries Continuous Pin Fed Checks with low pricing like the DCC157 Continuous 3 1/2″ Unlined Check QuickBooks Compatible 9 1/2 x 3 1/2″. The DCC157 checks start at: $144.38. These, like all products at 5forms have a 90 Day 100% Satisfaction Guarantee. Plus, UPS Ground Shipping is free on orders over $75 to the contiguous US (Postage required for AK, Islands, and Canada).
You can place your order online here DCC157 Continuous 3 1/2″ Unlined Check QuickBooks Compatible 9 1/2 x 3 1/2″ or call Customer Service Mon-Fri 9am-5pm EST at 
1-855-536-7675.