UPDATE!!!
I had some hesitation on buying replacement clips from eBay - the sellers wanted $9.00 for shipping, and depending on the seller what you got for $1.99 varied, etc... I figured I could buy them from Grainger or Global Industrial. However, I didn't have a part number.
I emailed Lyon for the part number... and they sent me a set of free clips! I was OK with purchasing what I needed, but instead they just sent me a full set.
So, props to the company for going above and beyond what I expected! I have had companies send me replacement parts - but never for something I bought second-hand.
John