Hello Srini,
as far as I know an 8 PRI E1 or T1 module is available for 7200 routers and it is a PA and I used it in the past.
Probably if you can use multiple modules also an ISR router 3845 could support 8 E1 PRI or even another ISR chassis like 2851. Here probably you can get a 2 E1 HWIC or network module.
Hope to help
Giuseppe