I need to replace the inside latch handle on the storm
door on the front of our house. Can you suggest a source

Home Depot, Menard's, Lowe's, Ace Hardware. All latches are pretty standard,
color choices are black or white. Only complete assemblies are available in
stores where I shop. Prices are pretty reasonable like $5 or so, and bolt right
into original mounting holes. You can make the change in 10 minutes. HTH

Joe