Hi,
Where to start... Well firstly there are not Coats of Arms for particular surnames . They are for individuals. For a name like Briggs there are likely to be more than one issued. I have found reference to EIGHT over the years.
I have also found a life Peer that was created in1976.
Unfortunately the 1980 copy of Burkes Peerage I have does not have a Coat of Arms illustrated. The illustrations are also lacking from the other references I have. (Armorial Families)
There are however a number of CRESTS used on the various Coats of Arms ... Crests are the emblems over the helmet on a full Coat of Arms. Most of the Coats of Arms you find on line for sale will not have the Crest displayed.
I understand that you are looking for something to display on this forum. May I suggest that you try a search of the internet via google and if you find one let me know and I will see if I can identify it to the individual .
The Life Baron created in 1976 was Asa BRIGGS from Yorks . He was in Education . Vice chancellor Sussex Univ
1961-76 Chancellor of the Open Univ. and Provost of Worcester Coll Oxford.
Your library may have a more recent edition of Burkes and there may now be Arms included.
If you are interested in the Crests (emblems) used then I have some examples of those along with some mottoes
but I do not have an illustrated Coat of Arms at this time.
I have verbal descriptions but creating an illustration from the description is I fear something I just do not have time for.
Hope this helps to some extent. Heraldry is as much , if not more , of a minefield as genealogy.
Best wishes Gj..