File::Find has the worst interface of all finding modules. I recommend Path::Iterator::Rule instead.

use Path::Iterator::Rule qw();
use Path::Tiny qw(path);

my %files = map {
    $_ => path($_)->basename
} Path::Iterator::Rule->new
    ->name(qr/hp[.]txt$/)     # regex of file name
    ->all('.');             # starting in the current directory
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