Brown Malt Substitute in London Porter Clone

[boist]

Hello everyone, need a piece of advice.
I would like to make a London Porter clone. I know the it relies on brown malt as one of its key flavor components, but alas, brown malt is not available where I live (not even by mail order). My question than, is given the entire recipe (below), what malt or combination of malts might I use to replace the brown?

Recipe (Original here):

8.27 lbs. (3.75 kg) Muntons pale ale malt
1.0 lb. (0.45 kg) crystal malt (75 °L)
1.5 lbs. (0.68 kg) brown malt
0.75 lb. (0.34 kg) chocolate malt

TIA!

 

[plainbrad]

There are some suggestions here

https://www.homebrewtalk.com/showthread.php?t=116513

I like the idea of toasting your own in the oven.

 

[boist]

I've done the roast at home thing once. Nice, but a big pain.

I like the suggestion of pale chocolate and biscuit though, I'll try that. Thanks!

 

[JKaranka]

It's still not the same, though. Brown is very difficult to substitute as pretty much nothing else comes close. It's a bit like running out of Maris otter and substituting with Pilsner and Crystal