The main issue regarding the J-10B/FC-20 delivery to PAF is the production issue. At present J-10A's production in China is not even meeting PLAAF needs.
To fulfill PAF order of J-10B/FC-20, Chengdu Aircraft Industry Corporation (CAIC) has to build a brand new facility which presently is in construction stages and it will take another 24 months before any production of aircraft can take place.
On the other hand, Egypt is studying the concept of J-10 seriously. Earlier this year a high level Egyptian military delegation visited China for two-weeks. It wants to replace its fleet of F-7 & MiG-21 along with Mirage V & 2000 and has shown interests in both JF-17 and J-10 aircrafts.
Source:
http://www.defence.pk/forums/pakistan-air-force/3218-j-10-fc-20-mrca-384.html#ixzz21ZFOZNDN