I think you may find Trichoderma ressei at ATCC: The Global Bioresource Center.

http://www.lgcstandards-atcc.org/?geo_country=ro

Yes, ATCC has cellulase-producing strains of Trichoderma reesei such as ATCC 26921 that could probably serve your needs.

Thank you. I know it. ATCC has no authorized distributor in Bangladesh. So I wrote them and they suggested me to open an account so that I can purchase samples directly from ATCC. But there is a problem in payment system, I can't use more than 100 USD at a time using Credit card. Then tried in ATCC Germany (my Teacher was there), but it looks costly (539 EUR).That's why seeking help.

Are you sure is Trichoderma ressei RUT 30, not RUT C30 (ATCC 56765, NRRL 11460, NRCC 2906, VTT-D-86271)?

Jose asked very important question! How did you know it is certainly Trichoderma ressei RUT 30?

Dear Al-Amin 

I have a company here, they sent me ATCC bugs, in dry tubes. About 10 ATCC strains (G+ve and G-ve bacteria)  costs me around 5000 Saudi Riyals (about 1300 USD)!.

I Think by contacting the ATCC company directly you may drop the commission fees.

Another suggestion is, email authors who publish articles about this fungi, to send you samples by any delivery system and you just pay the transportation fees.

Good luck

Emad

 NFCCI Pune, India and ITCC New Delhi, India.

if you want you can order at CBS-KNAW Fungal Biodiversity  Centre. They should have one in the pubblic collection.