Don’t know if you have seen this, from directories:
Have only gone up to 1841
1813
Dugmore Isaac, manufacturer of glass sand and emery paper, Fleet-street
Dugmore Thomas, manufacturer of scouring paper,Bromsgrove-street .
Dugmore Thomas, lapidary and stone cutler in general,Navigation-street , ,
Dugmore John, broker, Worcester-street
Dugmore Edward, wheeler, japanner and victualler,Nag's Head, Lichfield-street
1818
Dugmore Isaac manuf. of glass, sand & emery paper, Fleet-street .
Dugmore Thomas manuf. of scouring papers Essex-street
Dugmore Thomas, lapidary, and glass cutter in general N a v i g a t i o n - s t
Dugmore, Edward W., japanner, Lichfield St:
1823
Dugmore Thomas, lapidary, and glass cutter in general, 27.Fleet-street
Dugmore Edward, painter, 17, Newton-street
1823
Dugmore Jas. lapidary, Marlborough St.
Dugmore Thos. emery, glass, and sandpaper maker, 8 court, Bristol-st.
Dugmore Thomas, lapidary and dealer in foreign stones, 27, Fleet-st
1833
Dugmore Thomas and James, lapidaries and dlrs. in foreign stones, 27, Fleet-st
1839
Dugmore John, painter, and manufacturer of surveyors measuring tapes,
17, Newton street
Dugmore Isaac, lapidary, 35, Northwood street
Dugmore James, lapidary, 25, Mary street
Dugmore Thomas, lapidary and glass cutter, 27, Fleet street
Dugmore William, lapidary, 5 court, Cox street
Dugmore William, glass, sand and emery paper maker, Shakespear's Head
court, Queen street
1841
Dugmore James, lapidary, 39 Caroline st
Dugmore .John, measuringtape manufacturer, 17 Newton st
Dugmore John, spectacle maker, 96 Hill st
Dugmore Thomas, lapidary and dealer in all kinds of stones, 27 Fleet street
Mike