171c carb problems

[wap41]

I had the carbs redone on my solex 44 PA1 redone but the kit came with idle adjustment screws that are too big.I understand that my is the late model and they were smaller screws.The original screwa seem to be somewhat flat on the ends instead of pointed and I can't get it to idle real smooth.It runs fine at higher rpm's but wil die if left running at idle for any length of time.Any ideas where I might find the right screws?