Love shopping at the highly discount Premium Outlet malls in Orlando (2 premium malls).

Brands like Tommy, Gymboree, Steve maddin, MK, Lacoste(they mostly have big sizes on discounts), children place, Century 21 etc etc

My question is where in ""West Coast" can i find similar Premium malls offering the big discounts

Do a map search for "outlet malls" for the city to which you'll be traveling. For example, here's a Premium Outlet Mall just south of Santa Barbara.
http://www.premiumoutlets.com/outlet/camarillo/about

Then remember that most of the stuff you buy at these "discount" prices are no better than the online price you'll pay for the identical item. If you're looking for specific stuff, do an online search.

If you just enjoy the thrill of the "hunt," then go ahead -- window shopping in mega-malls is one of my joys.

In northern California, the two big ones are in Gilroy and Vacaville.

http://www.premiumoutlets.com/outlet/gilroy
http://www.premiumoutlets.com/outlet/vacaville

In sourthern California, in addition to Camarillo, there's a huge one in Cabazon and several others noted on the premium outlets website.

http://www.premiumoutlets.com/outlet/desert-hills

Probably the two best outlet stores in Southern California are the ones already mentioned, in Camarillo and Cabazon/Desert Hills.
There are also very good outlets in Las Vegas that do not require a long drive from the LA area.
Or look at discount non-outlet stores like Marshall's, Ross Dress for Less, TJ Maxx, etc.

I think you are going to be in LA - right? There is one right on I-5 - The Citadel. Probably considered City of Commerce -- but basically southern Los Angeles.

http://www.citadeloutlets.com/directory/

There is also a new outlet mall at the base of the Grapevine so if you are driving north or south on the 5, you have another option.

There are a bunch of these on the west coast, Carlsbad if you are going to San Diego.

And t near Disneyland it is called The Outlets at Orange.

The mix of stores is different at each so check their websites if you are looking for specific brands.