How to receieve messages in my MSMQ, from client who is using IBM Websphere MQ?

Question

My application needs to receive/send messages from customers. Majority of the customers are using MSMQ to post their messages to my MSMQ. But limited number of customers are using IBM MQ at their side. I am using BizTalk 2004 to handle these messages; since BizTalk is not having the capability to receive messages from remote IBM MQ on a different network, I need to install IBM MQ in my local server where BizTalk installed and customers (who are using IBM MQ) are sending messages to my IBM MQ, then from local IBM MQ to BizTalk. 

As part of upgrade of my application, I am planning to use Visual Studio 2010, BizTalk 2010, Win 2008 R2 and MSMQ 5.0. Also I would like to avoid using IBM MQ in my side. For this, I am looking for a solution, using that I could receive messages from customer's IBM MQ to my MS MQ. This way I would be able to avoid IBM MQ at my side. I read about MQ Series – MSMQ bridge but I guess that deprecated in latest version of OS/Visual Studio. I contacted IBM to know if there is any adapter provided by them to give this functionality (send messages directly from IBM MQ to MSMQ), but there is nothing available now.

Could someone provide more information about this topic and guide me?