I would take the above news report with a pinch of salt. I seriously doubt the Bangladeshi Navy would want to get rid of their newly inducted frigates after having spent millions in its acquisition, training of personnel, construction of support facilities etc. The only other alternative would be the older generation frigates in Bangladeshi navy service... which I doubt the PN is interested in.
As for the Migs... well what does the PAF want with 8 Migs??? If a russian origin combat aircraft is to be acquired by the PAF.. I think it would have gone with the Su27s from former Soviet states and in large quantities as Saad has mentioned. Possibly to be fulfill the deep strike role.
“In times of conflict the soldier does not control the war, rather the war controls the soldier. Occasionally, in the midst of such chaos and insanity windows of opportunity appear open to exploitation. It is how the window of opportunity is exploited, by the soldier, that defines the battle.... a battle which upholds the fallacy of the soldier in control of the war” (Anonymous).