Downloading items with the UOM

Hi All,

We have a created a new UOM called fwm_uom with the following lines

Abb:Abbrevation , conv Rate :Converion Rate

Name Plural Name Abb Plural Abb Conv Rate(/Base) Base unit
PA        PA          PA            PA          1              YES

CSE       CSE       CSE            CSE         6

PLT        PLT         PLT           PLT         12

And we have created an item with unitys type as fwm_uom . But when we try to download that particular item we are able to getting only Baes unit (PA) , but not the remaining (CSE,PLT). But for our Application we need the Item with three uoms(PA,CSE,PLT).
Is there any way to get the item with the three uomlines (PA,CSE,PLT).