Hrm well the 'best' insigne out there is probably 'Harefield Hall', which is a triploid. You might point your 'friend' *cough*cover*cough* to looking for a reputable vendor that has a division for sale.
Good luck! Finding a real Harefield Hall is a challenge in itself....everyone I've bought over the years has bloomed out to be at best ordinary insigne...at least once it was Leeanum....Take care, Eric
I got my 'Harefield Hall' from Joanne Brown at Stewart's back in the 80's and haven't seen it offered very often at all since then. I have seen several labeled as such at shows since then, but I'm pretty sure they weren't the Real McCoy. There are several cultivars out there that do look mighty close to 'Harefield Hall', and they probably even breed.
This may be a bit of a stretch, but I once bought an insigne from a place up in WA. Plant was about 8 growths, in good shape, and it cost $20. It wasn't a division, and the parents were nothing to get excited about... "Select" x self or something of that nature.
The place is called "Out on a Limb Orchids". I doubt that they have anything listed on their website (dont know if they have a website), but it might be worth contacting them. The owner is a lugubrious gentleman who seems to have lost the thrill of orchid growing, except for Miltonias. Or maybe he has SAD. Anyway, might be worth a try.