Paradox,
In my fleet (military) we routinely train to carry out such an approach using internal aids. It's not 'legal' as such, so we don't carry it out IMC live flying for training. The key point is that military flying in an operational context has a lot of variables that are not as easily controlled as in a peacetime context and a lot of your 'options' can be pulled from under you pretty quickly.
The procedure we use is fairly similar to the one described. If the airfield has a published approach we'll always try and mimick that in the kit, but if it doesn't I can have a look at the map, have a best guess and design what is effectively an RNAV/ point in space approach on the fly.
Our chain of command would certainly have no issue with us doing the above if there was no option, though there would hopefully be a review process after the fact to understand why we were forced into it and to try and prevent it happening again.