Shouldn’t be a length issue, guide rod seat length to the end of the recoil spring channel in the slide will match the same length as a 5inch 1911. Diameter of the guide rod is too small though (it’ll work but I personally prefer a tighter spring fit). Again really just need someone to make a guide rod that is stepped up before the seat for a short distance to better accommodate the round wire 1911 springs and then stepped down at the rest of the length to the front at the oem component diameter so the slide doesn’t have to be drilled out.
Alternately you could just 3d print - 1.2”-1.75” long .330”ish diameter sleeve and attempt to press it on to your existing guide rod down to the base. Probably would work, (might use an adhesive in addition to the press fit). Probably cheaper than getting another tungsten made.