A few options:
You can contact the manufacturer, VOXX Electronics, by phone at 1-800-645-4994 or by email at
[email protected]. They may be able to provide you with the accessories you need or direct you to an authorized dealer.
You can visit the VOXX Electronics website and look for the XR1020U model, which is the same as the XR1020 but with a universal trim ring. You can find the list of accessories and their part numbers on the product page. You can then order them online or call the customer service number above.
You can search for the accessories on online marketplaces such as eBay, where you may find new or used items for sale by other users. However, you should be careful to check the seller's ratings, reviews, and return policy before making a purchase.