Ip6t_rt.ko and xt_addrtype.ko

I am trying to migrate an existing separate host into an LXC on the Turris. The stock kernel supports most of what I need for this to work, but net/netfilter/xt_addrtype.ko and net/ipv6/netfilter/ip6t_rt.ko are not available.

Is there any way to get these added to the stock kernel builds?