I must admit I use a small shackle too, but if you find it too bulky I have some SS keyrings, and you'd be welcome to a couple.
They are only A2, but should be better than what you have.
PM me an address if you need them and I will pop a couple in an envelope.
RIBBED For extra pleasure.
Member of the ebay Blue RIB cover club.
Member of the Bombard 380 Aerotec club