Now that I stop to think about it, I doubt I've ever seen a slide to frame gap on a model 41.
The model 41 is made in Maine rather than Massachusetts, which may be one of the reasons its quality has always been more consistent than that of Smith & Wesson revolvers.
There's really no excuse for gaps on that pistol: it's been in continuous production with very few changes since 1957. I'll always prefer High Standard triggers, but willingly concede the model 41's design is more modern and stronger; the fit and finish are usually consistently better than High Standard delivered, and the gun is much easier to disassemble, clean, and reassemble.
It might be worth your while to measure all the parts involved before you get on the telephone.