Derek,

Thank you for being a trail-blazer, I'll widen the trail:

According to PED ayopa.t.taka = an iron plate or sheet

And rather:
to use the robe given in faith by rich kshatriya or rich brahmin or
rich householder
(as evident from the following fragment)

So here we go:

Aarocayaami vo, bhikkhave, pa.tivedayaami vo, bhikkhave, yathaa
etadeva tassa vara.m dussiilassa …pe… kasambujaatassa ya.m balavaa
puriso tattena ayopa.t.tena aadittena sampajjalitena
sajotibhuutena kaaya.m sampalive.theyya.

Ta.m kissa hetu? Tatonidanañhi so, bhikkhave, mara.na.m vaa
nigaccheyya mara.namatta.m vaa dukkha.m, na tveva tappaccayaa kaayassa
bhedaa para.m mara.naa apaaya.m duggati.m vinipaata.m niraya.m
upapajjeyya.

Yañca kho so, bhikkhave, dussiilo …pe… kasambujaato
khattiyamahaasalana.m vaa brahma.namahaasaalaana.m vaa
gahapatimahaasaalaana.m vaa saddhaadeyya.m ciivara.m paribhuñjati,
tañhi tassa, bhikkhave, hoti diigharatta.m ahitaaya dukkhaaya kaayassa
bhedaa para.m mara.naa apaaya.m duggati.m vinipaata.m niraya.m
upapajjati.

Let me tell you, monks, let me answer you, monks, that it better for a
person, immoral, wicked, unclean and suspect in conduct, secretive in
deeds, not a contemplative though claiming to be one, not leading the
holy life though claiming to do so, inwardly rotten, oozing with
desire, filthy by nature, if a strong man were to wrap the body with
red-hot iron sheet, blazing, burning, glowing.

Why so? For, monks, because of that he would suffer death,
or death-like agony, but on account of that, on the break-up of the body
after death, he won't be reborn in a place of woe, a realm of misery,
a state of punishment, a purgatory.

And monks, for such a person, immoral, wicked, unclean and suspect in
conduct, secretive in deeds, not a contemplative though claiming to be
one, not leading the holy life though claiming to do so, inwardly
rotten, oozing with desire, filthy by nature, who uses the robe given
in faith by rich kshatriya or rich brahmin or rich householder, for
him, monks, there is a long-term harm and suffering, and on the
break-up of the body after death, he is reborn in a place of woe, a
realm of misery, a state of punishment, a purgatory.

Metta,
Dimitry