then this string of 36 digits (that was written by him on a piece of paper with the word "ARMORY" , a username and the following digits....
Are these characters all among (asdfghjkwertuion) or among (0123456789abcdef)?
If it is the first one then it means you have half of the private key that Armory used to derive the child keys in the wallet file you have and the key to the address you posted is probably among them.
The problem is that brute forcing half of the private key is not possible because we are talking about 128 bits (ie. 2
128=3.4e+38).
Additionally depending on which Armory version that was used to create this wallet you may also be missing the chaincode used in child key derivation which is another 256-bit completely random entropy that you are missing which is not possible to even begin to brute force.
P.S. the address you posted
was never used (is empty) so all this effort may be pointless.
(I can possibly track down the person who would have paid the BTC)
If they could tell you which address they sent the coins to, it could help with the recovery since it is a lot easier to brute force a key (assuming you can find more than 36 characters) by having the corresponding child address.
I have a USER ID:
Probably can guess the Password
If the wallet that was used to receive the coins was actually Armory then there is no user ID.