Currently on eBay is this vintage Maurice Utrillo print matching the well-known framed picture in the living room of the I Love Lucy set. This one for sale has some damage so read the sellers description for details. See it on eBay :
Next is a hard to find small Gouda ashtray that matched one used as a small wall plate in the I Love Lucy kitchen. There were a pair of these each side of three larger ones.
A similar small ashtray was later seen on a small side table next to an armchair to the left of the Hollywood apartment set.
See it on eBay
Also on offer is a pair of owl bookends like the bookends I repainted to match the pair on I Love lucy in a previous project:
The above items are currently on eBay at the time of writing.
I also spotted this TV lamp with plume design similar to one seen on the I Love Lucy set 
It was recently sold on eBay however this was the first time I have seen one with a maker mark by Stewart B McCulloch who also made the pair of asian man and woman mantel statues 
https://www.ebay.com/itm/Vtg-Art-Deco-Stewart-B-McCulloch-California-Pottery-Desk-Lamp-Vase-Black-White-/163828742916
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Click here to see them on eBay
The statues are the same as the pair seen on the mantelpiece on I Love Lucy, except for minor differences, the pair on the show were pink instead of yellow – which we know from pictures of the original –