Yes. A similar thing happened to me a few years back and I bought a right angle bracket from B&Q which was a perfect fix and is still going strong. My pannier lug was swinging around and the B&Q bracket was a perfect fit over the top of the original lug. So, the lug is retained and the bracket supports it, this way it still fits the rack perfectly.
The fix worked so well I reinforced the other lugs in the same way. The bracket is in the ironmongery section and is a dark brown colour, so you don't even notice it's there. PM me your number and I'll text you a picture of it.