Foster is on-loan at the Hawthorns from Birmingham City.
"Dean's brilliant," Foster told the Birmingham Mail.
"He's from the Midlands, from the Leamington and Warwickshire area, and he keeps telling me it's a hotbed of goalkeeping because Tim Flowers is from there as well.
"Dean is class. I knew him anyway before I came here and when I found out West Brom were interested it was brilliant because I knew who I was going to be working with and what he was about and that makes it very easy to slip straight in."