Lip granulomas/cat allergy- product advice?

Hi!! My lovely kitty recently developed a lip granuloma (confirmed by a vet). She got a steroid injection to reduce the swelling. The vet thinks she is probably allergic to plastic, rubber, or wool? As she hasn’t had any major GI symptoms.

Does anyone recommend any toys or cat beds that are less likely to trigger a reaction? Plastic seems to be in everything!