Full stone df yellow facing for roll layer (windowsill) wanted.

Hello everyone. I unfortunately do not know if I am in the right interforum, if not, I apologize. We have bought a house that we want to renovate a little. The house has a yellow facing brick (presumably from the 70s or 80s). In this facing brick, one window is to be replaced and two additional ones installed. Since we do not like the old windowsills, they are to be replaced by a so-called roll layer, a brick windowsill. We have enough bricks themselves, but for the ends of the windowsill, we each need a solid brick. My question now is whether anyone still has such bricks lying around or knows where to get them. The exact dimensions of the brick are: 240x115x52 Thank you very much in advance, best regards, Sven