It's funny you mention that, i was doing the same thing. Wanted the one ring and a nice leatherbound book to be displayed along with the fellowship. Plan to empty a whole shelf just for that.
Anyway for the one ring, there are a few decent choices ignoring the gazillion walmart crap. Listed by price.
1) The original weta one ring, the best of course. $3300
https://www.wetanz.com/the-one-ring/from/brand
2) The noble collection 10k solid gold edition, a close second. $500
https://www.noblecollection.com/index.cfm?fa=products.product&id=NN9991&catid=17
3) The noble collection sterlin silver edition $130
https://www.noblecollection.com/index.cfm?fa=products.product&id=NN9269&catid=17
4) Some officially licensed version on amazon (doesnt look to be high quality) $50
[ame]https://www.amazon.com/OFFICIALLY-LICENSED-Rings-Frodos-Pendant/dp/B003IJXP3Y/ref=sr_1_1?ie=UTF8&qid=1328455246&sr=8-1[/ame]
There are also a few props by master replica and noble collection where the ring is suspended in a globe or on sauron's hand but i didnt include them as they take a large footprint and isnt really just the ring.
I am learning towards 3) noble collection sterlin silver, because the price and quality is good. Also it comes with a nice small footprint wooden display stand with the one ring quotes on it, makes it a very nice complementary display piece next to the fellowship statues. And i actually like the silver text on gold, makes it look nicer than gold on gold.
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Now for the book, that's a different story all the nice leatherbound version are in the $100s, i refuse to pay so much for a book! The only one i found that's good price is the 50th anniversary edition, but it still looks kinda "trashy" and doesnt have that old leatherbound book feel. Still kicking myself for missing the ebay auction for that easton version.
[ame]https://www.amazon.com/Lord-Rings-50th-Anniversary-Vol/dp/0618645616/ref=tmm_hrd_title_0?ie=UTF8&qid=1328455475&sr=8-1[/ame]