Have a look at these Mantle lusters. They are a good match the pair on I Love lucy. 
See the listing on eBay for more pictures
The lustres above are painted exactly like the pair on the show.
For a less expensive alternative the following pair of mantel lustres are still a good match but painted differently:
See them on eBay currently at a more affordable price
Also a second pair here : https://www.ebay.com/itm/Antique-Vtg-Porcelain-Floral-Lustres/202112452172
Hollywood Auction 89 – Day 2 offered by Profiles in History
Tuesday, June 27, 2017 | 11:00AM GMT-07:00
Calabasas, California, USA
LOT 946
Seller’s Estimate: USD 2,000 – 3,000
“946. I Love Lucy Charleton mantel luster with original Desilu property tag. (DesiLu, 1951-1957) Vintage original Charleton brand mantle luster from the I Love Lucy set. Consisting of a 13.5 in. tall by 7 in. wide standing ceramic luster with pale green, silver and gold oxide glazes and ornamented with delicate hand painted pink roses. Featuring 8-elongated teardrop and hexagonal faceted prisms, which dangle from the bottom of the uppermost fluted bowl of the luster. Retaining the vintage original round tag printed, “Desilu Prod. Property Dept.”. This was one of a pair of lusters highly visible atop Lucy and Ricky Ricardo’s piano and credenza in their New York apartment set practically from the beginning of the series (1951) until the couple moved to the country (1957). Originally acquired from Desi Arnaz’s long time assistant, Johnny Aitchison, and comes with a letter of provenance. A 4 in. segment of the top ceramic bowl has been broken and reassembled by the studio. In vintage very good condition.”
Related posts: http://www.50slucy.com/category/charleton-mantel-lusters
Seen on eBay this week – Charleton Mantel Lusters by the company that made the pair on I Love Lucy.
Lucy’s mantel lustres were painted differently but these are the same shape.
See them on eBay HERE