This is the 21st century, nor the early part of the 20th century! - PI filters haven't been used hardly at all for many decades - and for a 10A one you would be talking a LOT (and I mean a LOT) of money for a suitable choke.
All you need is a good sized electrolytic capacitor - as has been mentioned a lot recently, a 'rule of thumb' is 1uF per mA - so a minimum of 10,000uF, and preferably more (say two or three in parallel, this will help with ESR and ripple current).