NAT for specific IPs

Hi All, Looking for suggestions on how I can accomplish NAT for a couple of specific IPs, without NATting all the incoming traffic.

My scenario is as following:

source client ips 10.10.10.100 & 10.10.10.102 destination VS1(10.10.20.1.), load balancers to servers 10.10.10.10 & 10.10.10.20 (same subnet as the source address). I would like to NAT traffic from these client addresses to the floating IP 10.10.10.1, and all other client traffic no NAT is applied. I can't create a NAT Pool for 10.10.10.100 & 10.10.10.102 as they are members of pool for a different VS. 

Any ideas/suggestions on how I can accomplish this?

I appreciate your assistance.

Thanks

Deena