The brown one should be available via spare parts, it appears in 70945 Western Farm (unless I'm mistaken) - but obviously the colour could be a problem for you.
Thanks, can’t believe I missed that. I’ve added it to my random part list for a big order (keep doing small ones and the packaging costs are adding up).
Frustratingly a 1x2 floor piece - 30039810 is unavailable, which would be ideal in my custom Steck double house to correct an odd floor, which the 4-way would resolve:
Essentially want to replace the 2 1x2 pieces (currently 2x 30028470 and a joist) highlighted in orange with a 2x2 floor piece (30039800).
Then replace the 2x 1 floor pieces highlighted in yellow with the unavailable 1x2 floor piece (30039810). That would allow where the purple arrow points to still hang a prison sign. The prison then becomes 2 “squares” deep instead of 1. Once replace wall and corner pieces to create a thin prison room. That’s essentially a gap between two houses that sit on the first floor. The 4-way piece can go where the brown circle is. That’s quite hidden from view so would work nicely.
This is the custom house:
I’ll keep hunting eBay for that 30039810 part!