Steve,
For occasional track days, you do not need a high end triple layer 800.00 dollar suit. (Of course, if there is a fire, you may wish you had one)
Try
Racesuit they carry proban suits that are not too expensive.
For a helmet, get a full face unit, that is SA 00 approved. (This way you will be able to use the unit longer before having to replace it as sanctioning bodies do not like units over 5 years old.)