Steam DLC to Gaijin Account?

I am planning on getting the MiG-23 ML pack, but I cannot purchase it with my visa debit card (I think due to international restrictions from my cardholder company since it states I can only do purchases in the USA.) So I am deciding to buy it from steam instead. But I fear that this would transfer the vehicle to my steam war thunder account. Is there a way I can buy this pack on steam, and have it for my gaijin account instead of my steam war thunder account?