Land Rover Firewall blanking grommet

[mattmac]

Is the Land Rover Firewall blanking grommet (oval shape) MTC1650 a generic grommet that could purchase from a place like clark rubber or a specialised LR part ?

[travelrover]

Is the Land Rover Firewall blanking grommet (oval shape) MTC1650 a generic grommet that could purchase from a place like clark rubber or a specialised LR part ? There seem to be plenty of options in the uk, but nothing on the dimensions

MTC1650 - Plug - Land Rover Workshop (https://www.landroverworkshop.com/parts/MTC1650)