Iran client buying inquiry of Kato Crane Parts

Dear Sir/Madam,
We have got a ** fully hydraulic truck crane, model:"NK-75M-V-PJ" and capacity 4.9 ton whose air compressor ass'y is out of order.
So, we want to exchange its air compressor ass'y for a new one.
May I ask you how we can provide it directly?
Can you introduce us the nearest dealer of you to us who are in Tehran, Iran?
Yours sincerely.