Almost Any One-Handed Unique Will Work Here. Equipping Two Of Them Nets You The Achievement.
- Below Are Some General Tips For Finding Them.
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Store Any Uniques You Find In Your Stash.
Grind Your Way Up To "Maps" (Act 10+) And You May Already Have Two Uniques That Match.
A Few Lower Level Uniques Have Higher Drop Rates.
You Can Also Buy Them From Other Players Using The Game's Built-In Economy. They Can Range From Cheap To Super Expensive But Low Level Ones Shouldn't Cost You Much.
A Slightly More Advanced Method:
If You Know The Base For A Unique (Like Hrimsorrow's Base Is A Regular Goatskin Gloves): You Can Use "Orb Of Chance" To Make A Normal Item (Grey Or White) Increase To A Random Rarity.
- This Means An Orb Of Chance Has A Chance To Make A Normal Item Into A Magic, Rare, Or Unique.
Good Luck!