So I made my own Pre-Shave Oil...
... Actually it came out pretty good but having never used the Musgo Real stuff I really don't have a yardstick to compare it to. The ingredients are thus:
10ml Baby Oil (Lanolin based)
5ml Effacaisent Linement (Menthol, Eucalyptus, Methl Salycilate, Camphor)
8 drops Tea Tree Oil
I used it for the first time shaving today and did notice a difference in the closeness of the shave. It had a mild cooling effect on my face and best yet I had NO razor burn whatsoever even though I used a disposable razor that's past it's prime.