The Visitation of Norfolk 1552 gives the Arms of Downe of Bodney as :
Quarterly: 1 and 4 Argent, three pallets wavy gules, a mullet for difference;
2, Six mullets , 3,2,and 1, gules;
3, Sable, three bars argent, in chief three annulets of the second.
and notes that the Coats are confirmed by Clarenceux (King of Arms)
In layman's terms the 1st and 4th quarters are a silver shield with three vertical wavy red stripes and, in the top centre, a small star-like sign which indicates that this is a junior branch of the Downes family. The other quarters will be the Arms of heiresses who had married into the family, probably Tillis and Hogan, but you may want to check that out.
It seems the Downes moved on to Ireland as I see their Arms cropping up there as well.
I don't have the capacity to draw these arms for you at present, but perhaps SKS on here can do it for us !
Maec
PS. Sorry, I've just realised you already have the Downes' Arms as you are using them as your motif . I'll claim old age !