I bought my clip from ACI fiberglass (www.acivette.com
). Ecklers and ACI manufacturer most of the fiberglass body panels on the market and generally I hear good things about both. For me it was a tossup when I decided to buy my front clip. I bought several body parts from ACI including a front clip, rear quarter panel, rear tail lamp panel, rear valence panel and front valence panel. The only part I was unhappy with was the rear valence panel - it was too short but I made it work.
Anyway, I'm surprised to hear of the quality issue. Ecklers does have a good reputation. Can you post a picture of the defect? I'd be curious to see what you're looking at. If you're seeing a "ridge" of gel coat along where the bonding seam would normally be I wouldn't' be surprised - my front clip had a bit of that too. The expectation for any of these parts is that the piece will be block sanded prior to paint. Therefore, they don't bother with minor imperfections in the finish. Thankfully, the gel coat sands like butter and it's quick work.
If it's a major defect I suggest giving Ecklers a call and express your concern.