While I appreciate the benefits of SSCCE, I think the effort I would need to construct one in this case outweighs the benefits.

Because very often the process of creating a SSCCE will find the problem for you. In the process of creating a SSCCE you are forced to examine your assumptions. Often you will find they aren't correct. You also make it easy for us to reproduce your problem - why should we do all the work? See I know what I mean. Why don't you?.