Renderotica

I don't own it but these seem to be set up for the genital grafts products.

For Strand Hair or Fibermesh:
- Genital portions:
The Golden Palace and Dicktator meshes at least haven't changed with 8.1 I don't think. So, unless a script is blocking you. You should be able to load it directly to, load it solo then reparent, or load to 8.1 then reparent to 8 (why you would want to do this rather than update the character to 8.1 IDK).

Strand Hair/Fiber Figure portions:
The Meshes remain the same for 8 and 8.1 figures below the neck (I think only the eyelashes changed mesh wise). So unless blocked by script definitions they should load fine, otherwise load solo off of figure, or on assigned compatible figure, then try to reparent.

For any Shader/Materials portions:
The G8.1 Figures UVs are slightly different G8 "Torso" has been split into "Head" and "Body" on G8.1s. A manual copy paste of the Body to Torso (or Torso to Body depending on your UV set) in the surfaces tab should copy the materials over to the correct mesh location. As that portion of the figure mesh hasn't changed, its only displayed with additional subdivision by default.

Getting the color to match may be another challenge, as you may need to load or unload the PBR Skin Shaders between the 2 figure versions.
(*Note: as long as your character was for G8 the Morphs and Uber Iray (with Basic UV) will load to G8.1. So depending on the situation, it may be easier to load the Character and Materials to 8.1 then load the Hairs to the already compatible 8.1)

Hope that all was understandable and helps you out.