Thanks Phil!
You shall not find a list of individual instructors as previous posts stated it is FTO/ATO approval that counts. However there are a few instructors, mostly theory who operate on a 1 to 1 or informal basis for private tuition and/or weekends.
The caveat is that any training is extra and non-approved (under EASA course terms), you still have to do the minimum hours and attended formal courses to be signed off by your FTO. (I make this crystal clear on my website and during any conversations). That said I have found students struggling to manage study time and business commitments jump at the option & are happy to pay for it.