Steering column lower bearing

Anyone know the best type of lube to use on the lower steering bearing? First picture attached. They did not seem to be too worn on the plastic surface after about 350k but since I had the steering apart and was changing the rubber bushes on the sliding tubes... The upper steering bearings usually dont wear and are in excellent condition. Had a great time replacing the inner/outer support tube bushes....Was unsure what lube to use here as well as you cannot get the rubber originals; they are re manufactured in silicone, second photo. The UK Forum seemed to think a silicone grease for these bushes but I dont know what to use on the yellow plastic bearings.

I called the local Penrite company to get an update on what oils to use where. They have excellent over the phone tech advice which can be more useful than the books or on line. I am very happy to support as they are Aussie made and Aussie owned too which I often forget about this group. I often buy up from Repco when they have their weekend sales. Savings are great but you need to get in early. Product list below but there are more products not listed below they have that need to be used on the vehicle in other areas.