Wait, you're running BigWigs... and DBM? o_O
Install BigWigs_PizzaBar. This shows the "Pizza" and "Pull" timers from DBM as Bigwigs bars.
The problem is not, that I have to install something new, the problem is that nobody in my raid with bigwigs will see the DBM pull timer, that is written in the raidchat.
Why not? Do you have any problems with dbm? I mean where is the problem to let people with bigwigs see the countdown, that is written in the chat window (the rest is still blocked)? Don't think it would harm your addon.
Perhaps you just want to implement a simple countdown in your addon that is written in the chat (e.g. pull in 5sec - pull in 4sec - pull in 3sec...)? Not only a bar, that only people with bigwigs installed can see.