Good afternoon. I apologize for my ignorance but would you mind sharing how deep you want the problems to be?
As a general response to your question I would suggest grabbing the problems out of Apostol's 2 Volume text.
As I am sure you are aware (not being snarky but acknowledging that this is probably a reminder) Apostol, Spivak and Courant are the cited rigorous calculus texts compared to Stewart, Briggs, Thomas, etc.
Another option would be to grab the few Calculus Books from Schaum's Outlines. They basically just work problems so that might provide a good resource.