Most labs do not want to do tissue culture of less than 1000 plants. For that quantity, the price is then about $1.00 each.
Some labs will do less, but then you have to pay more per plant.
I have seen some places willing to do 100-200 for around $2.50 each. I would be willing to sign on for that. None of them seem to want Cattleyas though. I am going to also ask around the local universities if they have students in the plant sciences that would be willing to try for a fee.