6 x 8 hard plate

What kind of threat are you anticipating?

Any threat level will do, it's just for the range. Actually now that I say say that the higher the better ! I have the soft armor but they want a hard plate.

Shooting pistol or rifle at the range? A chicken plate (steel trauma plate for soft concealable vest) will give additional support and blunt force trauma reduction, but will NOT stop rifle threats. I don't know of any ceramic small rifle plates that will fit in the pocket of a concealable vest, and if theyre out there they will be pricey.
Your best bet for a cheap steel trauma plate is www.bulletproofme.com. They also pop up in the holster boxes of some gun stores.
Rifle plates start at about $60 for Ar500 steel (not good) to level III and IV ceramic plates start at $150 and go up to $1000 (per plate). Plates can be stand-alone (used by themselves) or ICW (in conjunction with IIIA soft armor). If you're working, its not a bad idea to spend the money to have your own decent set of plates in a carrier, you can get a complete package for $400. Beware the secondary market, there are cheap used plates on eBay, but ceramic plates can crack reducing their effectiveness.

Target-man also has cheap ar500 sideplate set for $40

I have been scouring the eBay market I'm not impressed and quite frankly I am scared of buying from there although it is only for training at the range. This time we are only doing pistol training. What I am looking for is to fit in the front pocket of my concealable best. From what I understand the side plates are 6 x 8 curved I don't know if they will work or if I need a flat front plate.

Merry Xmas, I'll even do the leg work for you. 15 bucks, there you go:
http://Www.bulletproofme.com/Body_Armor_Accessories_Concealable.shtml#Trauma_Plates

That's perfect, thank you and be safe

Thanks Hush, I called, he had it, it shipped