That's A Big Fat NO!!!!!!!!!
Apparently you seem he11 bent on creating more more problems for yourself. You have a IRN that has psychosis from being in a cage that is too flipping small, not enough attention, lack of enrichment and knowledge on your part.
Every person that has given you solid advise, their knowledge, you have blown off. I feel sorry for your IRN, he is basket case, he deserves BETTER then you for a companion. Bringing another bird into the picture will just compound his problem. Please consider doing yourself a huge favorite, rehome the IRN and before purchasing another bird. Lock yourself in that cage and live in that tiny space for 24/7, see how you like it.