Unable to import from Namespace

I need to import data from a feed but one of the namespaces that has been used is not valid XML in that it is all uppercase instead of camel case.

I am able to import from any XML element except the ones using this namespace - is there a way to force feed import to accept those elements or another way of using xpath to reference those fields?

e.g.

<validNamespace:myElement>Value1</validNamespace:myElement>
<CAPSNAMESPACE:element>Value2</CAPSNAMESPACE:element>

I can access the value of the first element with xpath to validNamespace:myElement but if I try to reference CAPSNAMESPACE:element I get nothing.

Any suggestions welcome